Speing



T. A. TlSDELL.

SPRING.

APPLICATION FILED SEPT. 6; I918.

Patented Feb. 24, 1920.

4 SHEETSISHEET 2.

T. A. TISDELL SPRING. APPLICATION FILED SEPT. 6, I918.

Patented Feb. 24, 1920.

4 SHEETS-SHEET 3.

T. A. 'HSDELL.

SPRING.

APPLICATION FILED SEPT. s. 1918.

Patented Feb. 24, 1920.

4 SHEETS-SHEET 4.

screwed, or rigidly secured to prevent rotation of the barrel. Between the ends of the barrel part and the limbs of the bracket within which the trunnions engage, spaces are left. Y

Transversely through the barrel a square or other aperture is provided. Within this aperture the laminated spring d is adapted to be rigidly secured, as for instance by screws al The laminated spring thus projects from this trunnion, and the free end thereof is enabled to rise and fall in the spring action.

The spring d is composed of laminae of successively increasing lengths rigidly secured together at one extremity by the screws d. The longest lamina is throughout its length or throughout apart or half of its length near to the free end of the spring curved in a slightly increased degree so that it diverges from the adjacent lamina. In like manner, the second and the third, or any suitable number of the laminae, may divergeffrom the succeeding lamina.

Or the first, second, or third laminae may collectively diverge from the others, that is to say, the separately operable elements of the spring may each involve more than one lamina.

The said spring is entirely inclosed within a casing adapted to oscillate about the axis of the barrel a. In the construction shown the casing comprises a tapered sheet metal tubular member 6 closed at one extremity and widening in a direction toward the barrel a. At apoint adjacent to the bar- ,rel a said member e is received within a socket 7 provided in a composite member adapted to embrace the barrel a. This comosite member comprises a circular bearmg member g, which for convenience of assemblage is divided into two halves transversely of the axis of the barrel a. This bearing member 9 is gripped between the base part of the socket f and the strap-like part h, which parts are securely bolted together around the composite bearing member g. z is an aperture provided in the hearing member 9 through which the spring (1 passes, and which aperture is of size permitting of rotation of the bearing member 9 about the barrel a. At each axial extremity of the barrel (1, the bearing member 9 is furnished with inward flanges g of cranked crossed-section, which, in conjunction with annular recesses in the trunnions b of the barrel a, form annular spaces adapted to accommodate felt washers 7' adapted to con fine lubricant and exclude dust and like foreign matter. is is an opening in the bearing member 9' through which lubricant may be admitted by way of a screw plug k At its extremity remote from the barrel a: the longest lamina of the spring d may carry a roller d or other part adapted to slide or roll on a bearing d provided, at the inner face of the casing e. The wheel axle may be secured to the casing e, as for instance at a point on the outer side of the part of the wall thereof with which the bearing d is provided.

The casing, may be more strongly built and may, as shown in Fig. 3, itself be adapted in function as a radius rod e", to which the wheel is coupled in any suitable manner. In this arrangement the prOjecting extremity of the spring may alternatively cooperate with the casing e in any suitable manner, as for instance by bearing upon a transverse roller therein or by projecting between two transverse rollers located within the casing c.

Fig. 4 shows a modification of the embodiment shown in Fig. 3, in which the wheel is secured to the casing e by a divided clip Z secured to the wheel and embracing the casing. Between the clip 5 and the casing rubber or other flexible packing may be incorporated. With the arrangement according to this embodiment the effective length of the casing 6 may be thus shortened in relation to the length of the spring, with the obtaining of increased flexibility and greater lateral rigidity.

Fig. 5 illustrates an embodiment of the invention in which the wheel carries a bracket m to which two of the barrels a are fixed, and from which barrels the casings 6 containing springs extend, one of said casings being pivoted to the chassis at n, and the other being coupled to the chassis by a link 0.

Fig. 6 illustrates an embodiment of the invention in which an arrangement of casings and bracket similar to those e and m. shown in Fig. 5, are incorporated, but with one of the casings e rigidly secured to the chassis 0 as for instance by clips 0 the bracket m being oscillatorily movable in relation to the casing e, and the casing e being oscillatorily movable in relation to I proximates that illustrated in Fig. 3, but involves in addition a radius rod 72 pivoted at one extremity to the wheel end of the casing e and connected at its other extremity to the chassis by a link {1. The embodiment shown in Fi 8 approximates that shown in Fig. 5, but involves the mechanism of Fig. 5 in inverted disposition and located trans: versely of the car, we being a bracket fixed to the chassis in which two of the fixed barrels a are incorporated. In relation to the said barrels casings 6 are adapted to oscillate. These casings 6 are connected at their projecting extremities by links 1' to the transverse wheel carrying element.

In the embodiment shown in Fig. 9, a

spring (1 projects on both sides of the fixed barrel a the laminae increasing in length downwardly of the spring on one side of the barrel and upwardly of the spring on the other side of the barrel. The casing d which incloses this spring al and which is adapted to oscillate about the axis of the barrel a carries at one extremity (Z the wheel axle, and at its other extremity carries an internal bearing (Z upon which the corresponding end of the springal" bears. Elevation of the wheel in relation to the chassis c has the efi'ect of upwardly flexing the part of the sprin to the left of the barrel a (in Fig. 9) an of depressing the part of the casing cl to the right of the barrel (1. with the result that the parts of the spring d on both sides of the barrel a are flexed in a direction toward the shorter laminae of said parts.

The embodiment illustrated in Figs. 10 and 11 approximates that illustrated in Fig. 6, but differs in that instead of employing two barrels (0 located eccentrically "and connected by a bracket, it involves co-axial barrels rigidly or integrally connected together. The casing d which carries the wheel is adapted to oscillate upon a barrel, the one trunnion of which is integral with or rigidly secured to an adjacent trunnion of another co-axial barrel adapted to oscillate within the casing 01, which latter is suitably secured to the chassis c.

What I claim as my invention, and desire to secure by Letters Patent is 1. In combination, an element, a spring rigidly fixed to said element and extending in one direction therefrom, and a rigid casing inclosing the spring, said casing being pivotally mounted on said element and hence arranged to move with the spring.

2. In combination, an element, a leaf spring rigidly fixed to said element and extending in one direction therefrom, the leaves of said spring diverging in such direction, and a rigid casing inclosing the spring" and pivotally mounted on said element for movement with the spring, the dimensions of the casing exceeding those of the spring to such an extent as to permit limited independent movement of the spring in the casing.

33. In combination with relatively movable vehicle members, an element rigidly fixed to one of said members, a spring rigidly fixed to said element and extending in one direction therefrom, and a rigid casing inclosing the spring, pivotallytmounted on said rigidly fixed element and connected to hicle member.

In witness whereof I have hereunto set my hand in the presence of two Witnesses.

THOMAS ARTHUR TISDELL. Witnesses:

AR HUR H. BROWN, A. J. DAVIES,

the other ve- 

